29 Miracle questions of Sound in PSC Examinations 2016

Miracles of Sounds in psc examinations

Let us study some psc tips about sounds ,sounds may be sweet ,hard ,irritating ,moderate level .By the following points we can study the different characteristics of sound which is more helpful in psc examinations.Acquire the rank marks lies behind the different types of sounds ,then sound plays miracles in your life.

Sounds Importance in PSC Examinations

Differant types psc questions can be expected from this sections.That may be vital for rank making point of view .Study each and every points from this sections to improve your capability in this section for attending psc on line examination point of view too.

What is the use of Mac number
Ans:To record the speed of planes and missiles

One mac number is equal to
Ans:340 m/s(Velocity of sounds in air)

Name the creatures used their sound to remove the obstacles of their journey and also to know their presence to prey
Ans:Vulture and Dolphin

Name the instrument used to detect the depth of ocean
Ans:Sonar

Name the term used to the returned sound after hitting various surfaces within one tenth of seconds
Ans:Reflection

Whispering gallery ,the best example for sound reflection is situated in which place
Ans:St:Cathedral in London

Up to what time the heard sound is remains in the ear
Ans:one tenth of seconds

Name the instrument used to the graphical representation of sound
Ans:Oscilloscope

The equipments used to the observation of internal organs and taking picture of it
Ans:Ultrasound scanning

Why the sound not heard in moon
Ans:Due to the lack of air

Name the instrument used to the sound experiments
Ans:Sonometre

Name the repeated reflected sounds heard after hitting various objects
Ans:Reverberation

The sound range which is harmful hearing
Ans:Above 120dB

The permitted sound range in the human habitat
Ans:50 dB in day time and 40 dB in night time